Mill for grinding.



No. 125,521. l PATENTED APR. 14, 190s.. Y

J. a. WEGBRIR MILLFOR GRINDING.

l APPLIOATION FILED NOV. 7, 1902. N0 MODEL. 2 SHEETS-SHEET 1.

' PATENTED APR.14,1903.

J. C. WBGBRIF. MILL FOR GRINDING. APPLIUATION FILED Nov. '1, 1902. No MODEL. z SHEETS-SHEET 2.

NVENTOH v Afm/MHS. v

UNirED STATES VPATENT OFFICE.

JOHANNES OHRISTIAAN WEGERIF, OF BATTLESBRIDGE, ENGLAND, ASSIGNOR TO THE RENFREW ORUSHER COMPANY, LIMITED, OF

LONDON, ENGLAND.

MILL. Fon GRINDlNcf SPECIFICATION forming part of Letters Patent No. 725,521, dated April 14, 1903.

Application filed November 7, 1902. Serial No. 130,399. (No model.)

To all whom it may concern:

Be it known that I, JOHANNES CHRIsrIAAN WEGERIF, engineer, asubject of the Queen of the Netherlands, residing at Rawreth Rectory, Battlesbridge, in the county of Essex, England, have invented certain new and useful Improvements in Mills for. Grinding, of which the following is a specification.

My invention relates to pan-and-roller mills of that kind wherein the grinding-rollers are set skewwise or with theiraxes'non-.radial to the axis of the pan an'd,'as well as the pan,"

are positively driven, s'o as to thereby cause a tearing orvdisruptivedaction to be exerted on the particlesto be ground in addition to. the usual crushing action.` `The disruptive or tearing action thus obtained may bethe.r same for all the rollers in thesame pan, or it may be varied to suit the varying degree of neness of the material in its progress. through the mill by arranging the Vaxesof the grinding-rollers or edge runners taugen? tial in the one case to the same circle and in the other case to dierent circles concentric with the pan-axis. The minimum distancesbetween the rollers and the pan may also be progressively varied inversely as the obliquity of the rollers and with the same`object. The pan and likewise the rollers are positively driven, so that their points of contact run in similar but diverging directions,

the bearings of the rollergudgeons being` loaded by the pressure of springs or weighted levers directly applied thereto.

In the accompanying drawings, Figure lis an elevation, and Fig. 2 a plan, of the improved pan-and-roller mill; and Fig. 3 is a plan View illustrating a modified arrangement of the axes of the rollers.

The same letters of reference indicate the same parts in all the figures.

A is a pan.

B represents the rollers.

C represents the. roller-gudgeons, each mountedfin bearings fitted to slide in vertical guides in a pair of arms S. In Figs. l and 2 these arms S are dependent from the cross-girders E of a fixed overhead frame, the axes c of the rollers being tangential to the same circle c', or the axes of successive rollers might be tangential to circles of progressively larger diameters concentric with the axis a of the pan, as 'shown in Fig. 3, so as to produce progressively-Varying degrees of cross-grinding suited to the progressivelyvarying degree of fineness of the material operated on. The bearings of the roller-gudgeons are loaded by springs H, applied directlyV thereto, and put under compression, Which'is regulated simultaneously for both springs of the same roller by means of hand- 'operated screw-gear T. Stops, adjusted by hand-wheel and screw-gear I, are provided yfor regulating the minimum distance between 'the rollers B and pan A. This minimum dis- -grinding-rollers as well as the pan are positively driven and have their axes mounted non-radially to the pan-axis, bearings at opposite sides of each' roller in which the axis is mounted, the said bearings being loaded with yielding pressure applied directly to each bearing, both of the bearings for each roller being fitted to slide in xed vertical guides, substantially as specified.

2. In a pan-and-roller mill, in which the pan and grinding-rollers are positively driven and in which the axes of the said rollers are mounted non-radially to the pan-axis, bearings at opposite sides of eachroller`in which the axis is mounted, fixed verticalguidesin which the bearings are lfitted" toslide, a spring applied directly to each bearing andadapted to be compressed to exert pressure thereon, and means for simultanously regulating the degree of compression for both springs of theI same roller, as set forth.

JOHANNES CHRISTIAAN WEGERIF. Witnesses:

JOSEPH LAKE, WALTER J. SKERTEN. 

